Still No Sign Of My Willy!

I'm getting more than a little concerned now, as my mole-rat, Willy, seems to have disappeared without a trace.
I've even gone to the lengths of researching the little fella's habits in the wild, in the hope of gaining some insight into where he may be hiding. All I could come up with is that he likes to nest in warm, soft moss, he only needs a minimal amount of water and can survive for about three months without food.
Not much help there, then!
I've looked around the flat, but all the moss that had gathered while I was away, seems to have perished since I've had the central heating back on.

I'm getting a little frantic now, as seems to be echoed in my level of anxiety. That gnawing feeling is getting quite a bit stronger and starting to have an impact on my ability to pee.

Are there professionals out there that can help?